A colleague of mine as a very similar problem.
He's tried emailing this other guy, forwarding on mails etc but the dick persists in using my colleague's email address. It's been going on for years, apparently.

Including for the flights he booked for his holiday to Australia. So my colleague cancelled them.
( Kroney, Tue 17 Jan 2012, 10:01, 2 replies, latest was 14 years ago)

Good work. Do you have the same name? Could have had a free trip to Australia.

( Fucking hell Jeff I am not a robot, Tue 17 Jan 2012, 10:03, Reply)

mine is 2 different people
the worst offender is the milwaukee desperate housewife. i know she's actually quite hot, as one of her friends sent me a video of her on youtube when she auditioned to be p diddy's personal assistant. but she's still terrible.

the other one is a black 50+ lecturer in feminism in new york. i know this because occasionally i get her students' essays and she once signed me up to a 50+ black dating website. in new york. i'm thinking i would have been a disappointment on a whole host of levels. anyway, i got a few messages from "sandy 56" and "blackjeans" etc. the poor woman must have wondered why not one guy on the website ever emailed her.
( rachelswipe with a fork, Tue 17 Jan 2012, 10:04, Reply)

Make an enquiry on the Scientologists website using her email address. She'll get contacted daily.

( Fucking hell Jeff I am not a robot, Tue 17 Jan 2012, 10:07, Reply)

but that's the problem
i don't KNOW her email address! and nor does she, by the look of it.
( rachelswipe with a fork, Tue 17 Jan 2012, 10:13, Reply)

hi battered, hows it going?

(Quintno EXPERIMENT RUINED CANCELLED, LEFT 4EVER, Tue 17 Jan 2012, 10:37, Reply)